Coupling arrangement for two-way optical communication using double-refracting prisms

摘要

In known coupling arrangements, signal power losses of about 50% occur in each case in the coupling between two input paths and at least one output path or in the opposite direction. According to the invention, a coupling arrangement comprising two double-refracting prisms with one Faraday rotator disposed between them is proposed which has no system-related power loss. Through the coupling arrangement, not only the light from one laser diode but also from two laser diodes can be coupled into an optical waveguide so that with corresponding arrangement or control of these laser diodes, polarisation division or wavelength division multiplexing is also possible.